This unit will present a historical and comparative review of the APS code of Professional Conduct using "ethical hypotheticals" in a number of applied and research settings; examine the notion of "professionalism" in both client service and multi-disciplinary settings. The scientist-practitioner model will be examined, and its implications for "generic" practitioners and "eclectic" practices. Other issues examined: turning points in the history of psychological testing; evaluating and developing tests; clinical, organisational, research and forensic testing; issues for rural psychologists.